python-gammu ussd response delay

[JerrelS]

Hi Guys,
I've been trying out python-gammu the last couple off days, and noticed a delay in the ussd response when using the service_numbers example.

The response is -+ 17 seconds, while for the same ussd command I receive a response within 4 seconds, if i sent the AT command
AT+CUSD=1,,15 using socat.

I noticed that the state_machine.Init() takes 5-7 seconds

Any idea how i can speed up the init process within python-gammu

My setup:
CentOS 7
python 3.6
python-gammu 3.1
modem: wavecomm wmod2 (at9600)